1000 points of light – Students at Virginia Tech hold a candlelight vigil after the Virginia Tech massacre. Image: Wikimedia.

Virginia Tech University, the site of the country’s worst massacre, is on lockdown today following reports that a police officer has been shot and killed near the campus and the gunman is on the loose.

The school’s website reports that a police officer has been shot and the Collegiate Times, the student newspaper that covers Virginia Tech, is reporting that the police officer is dead.

There are reports of a potential second victim.

The school is saying that the suspect is at large and students are being told, “Stay indoors. Secure in place.”

An alert on the Virginia Tech school’s website said: “There is an active campus alert in Blacksburg. Everyone should seek shelter or stay where you are. Blacksburg Transit service is suspended until the alert is lifted.”